Combined governor and safety device for gas-engines.



No. 833,393. PATENTED OCT. 16, 1906.

B. R.- INMAN. I COMBINED GOVERNOR AND-SAFETY DEVICE FOR GAS ENGINES.

APPLICATION FILED JAE. 18, 1905. RENEWED SEPT. 13. 1906.

Svwemtoz zwzw which form a parthereof, and in ,Which- UNITED STATES PATENT FFICE;

- EDWARD R. INMAN, OF FRANKLIN; PE NsYLvANIA, AssIGNoR'ro- PRODUCERS SUPPLY COMPANY, OF FRANKLIN, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA. v

COMBINED GOVERNOR AND SAFETY DEVICE FOR GAS-ENGlNE S.

To all whom/it may concern):

. Be it-known that LEDWA'RD R. INMAN, a

citizen of the United States, residing at Franklin, in the county of Venango and State of'Pennsylvania, have invented certain new and useful Improvements in a Combined Governor and Safety Device for Gas-Engines, of which the following is a specifica tion, reference being'had therein to the ace companying drawings. y invention relates to an improved combined governor and safety device for explosive-en ines, which will be fully understood from t e following specification, reference being had to the accompanying drawings,

Figure 1 is aside-elevation of a1 gas-engine .cylinder, showing, my overnor position thereon, together with tie actuating mechanism. Fi 2 is a plan. view of the cylinder,

' one side eihg iri'secti'on, and'showi'ng also the cylinder 1 by means of t the-valve-case of my governdr in section. V The object of m invention is to provide a safety or relief va ve for two-cycle engines which will provide a relief for the/force of an explosion in the pump-chamber when fire strikes back into said chamber from the explosion-chamber of the cylinder. I

A further object of my invention is to provide, through the same means and mechanism'by which my said first object is attained, a governor which will regulate the speed of the engine.

'The construction of the mechanism by which I accomplish these objects is substantially as follows:

Upon the side of the cylinder 1 of a gas-engine is laced a valve-case 2, in the chamber 2 of w 'ch is seated a valve? of the pn pet t pe The valve-chamber 2 at one si e of the valve 3 is open to the pum -chamber 4 of 'e passage 2", and the chamber upon the other side of said valve is open to the atmosphere by means of the port 5. By this arrangement, it willb'e understood,pressure in the pump-chamber 4 will tend to unseat the valve 3, and would do so were this not prevented by the spring 6, which bearsagainst the valve with suflic ent. pressure to keep it to its seat against any normal compression in the pump-chamber;

Specification of Letters Patent. Applicaticin filed January 18, 1905. ae eweisa amw 13,1906. Serial but when an explosion occurs in said cham- Patented Oct. 16, 1,906.

her and an abnormal pressure is thus developed therein the valve 3 is raised from its seat, and the force of the explosion is thus relieved through the port '5, and the force which would otherwise damage the engineis' thus relieved without any damage whatever.

The operation of the governor is as'follows The stem 7 of the valve 3 projects through the case -2 is provided with a knuckle 8, which is rigidly affixed to said stem. In said knuckle '8 is hinged a latch-block 9, having a longitudinal-hole therein, into which one end of an eccentric-rod 10 reciprocates. The

other end of rod 10 is attached to an eccentric which is secured-to the crank-shaft of the engine, so that said rod reciprocates con tinuously-when the engine is in operation.

A bracket 11 is rigidly affixed to the ecc'entric-rod, and in said bracket-a pick-blade 12 is mounted in such a manner asto be free to oscillate verticallyf'and the weight 13 normally holds blade 12 from engagement with the latch-block 9. When the speed of. the

engine exceeds a certain limit, however, the

inertia of weight 13 causes'it to lag, and blade I 12 is-thrown .down into engagement with the notch 1 1 in the latch-block 9, valve 3 is opened, and the power charge may escape from the pump-chamber to the atmosphere explosioninstead of passing back into the chamber 15 of the cylinder.

So far as the operationof my device is con-- cerned it is immaterial by what means the fuel charge is admitted to the pump-cylinder;

but I have here shown a mixer-valveflfi, through which the fuel mixture is supplied to the pump-chamber. g

The piston 12 is of, course operable in the is cylinder,.and the fuel charge asses from the pump-chamber 4 to-the ex osion-chamber 15 through the by-pass 18 w en the istonr'is in the position shown, theex ande charge having previously passed out t ough the ex haust-port 19. A

Having thus describ'ed my invention, what I claim as new, and desire to secure by Letters Patent,-is

In a combined governor andsafety device for two-cycle gas engines, the combination of an engine piston and cylinder, a crank or pump chamber havin a charge-inlet, a pas sage leading from said chamber to the cylinder or expl0sion-cha1mber,and a passage to the atmosphere, an outwardlympening valve in-said passage spring-held a ainst charge compressien, but'capab1efy1elding to the 5 pressumofamnemplosienin said crank or pumpchamber, and an-eng-ine-actuated governor. censtructedto open sald valve on'excess speed.

' Ixi testimony whereof I efiix my signature in presence of two witnesses.

EDWARD R. INMAN.

Witnesses:

D. K. BUCHANAN, 4 MARSHALL 'PmJePs-h 

